Detroit Rental Cash-Out Refinance: How Much Should You Borrow?

Detroit Rental Cash-Out Refinance: How Much Should You Borrow?

It’s time to grow your portfolio, and you’re looking at a Detroit rental cash-out refinance to free up the down payment for Property #2.

Your lender says you’re approved.

But how much of that approval should you actually take?

This comes up constantly with our landlord clients, so we’re going to work through the questions that matter before you sign anything: 

What is a cash-out refinance actually doing to your balance sheet? How much will a lender allow? How much can the rent realistically carry? What happens if you need to sell in two years? And how do Detroit’s property taxes change the answer?

The short answer: A lender’s maximum loan amount is a ceiling, not a recommendation. Before choosing a cash-out refinance amount, test what the lender permits, what the rental’s income can support, and what leaves you enough flexibility if your plan changes.

Three Tests Before You Apply

A cash-out refinance can be a useful way to redeploy equity. It can fund repairs, build reserves, or help create the down payment for another property.

But the amount a lender will approve isn’t automatically the amount the rental can comfortably carry.

So before you decide how much to borrow, run three tests:

1. The lender test: What’s the maximum loan amount allowed by the appraisal and the loan program’s loan-to-value limit?
2. The cash-flow test: What loan amount can the property support after realistic operating expenses, vacancy, and reserves?
3. The exit-flexibility test: If you needed to sell or refinance later, how much debt would you be able to carry after closing costs and paying off the loan?

Test	What it answers	Illustrative result
Lender test	What’s the maximum loan allowed by the appraisal and LTV rule?	$112,500
Cash-flow test	What loan can the rental support at a 1.25 DSCR under the model assumptions?	About $80,948
Exit-flexibility test	What debt level leaves a $10,000 equity cushion in your chosen exit strategy?	$88,696
Conservative starting point	How much should I actually borrow?	About $80,948

 

In this example, the lender may allow you to borrow $112,500. 

But the rental’s modeled cash flow only supports roughly $80,948 at a 1.25 debt-service coverage ratio. 

The difference is added leverage that the same rental income has to support every month.

What a Cash-Out Refinance Actually Does

A cash-out refinance replaces your existing mortgage with a larger new loan. The new loan pays off the old one, closing costs come out, and you get the remaining cash.

That cash is new debt you’re taking on.

Here’s an example using a $150,000 appraised value and a hypothetical 75% loan-to-value limit:

Cash-out refinance example	Amount
Appraised value	$150,000
Maximum new loan at 75% LTV	$112,500
Existing mortgage payoff	-$50,000
Refinance closing costs	-$4,000
Cash released before reserves	$58,500

Note: LTV limits, rates, terms, debt-service calculations, reserve requirements, fees, and prepayment penalties vary by lender, property, and market conditions. 75% is just an example.

The Lender’s Number: Appraisal and LTV

A lender generally begins with the appraised value and the maximum loan-to-value ratio permitted under the loan program.

In our illustration:

Lender test	Amount
Hypothetical appraised value	$150,000
Illustrative LTV limit	75%
Illustrative maximum loan	$112,500

 

$112,500 is the lender ceiling in this example, but that doesn’t mean it’s the amount you should actually borrow.

That’s because lenders don’t necessarily calculate rental income the same way you do. They might use your actual lease, or market-rent estimates. They might have different requirements for reserves, or treat taxes or insurance differently.

Ask for the lender’s actual calculation in writing. Then run your own conservative operating model alongside it.

The Property’s Number: What the Rent Can Realistically Carry

For this example, we assume $1,500 in monthly rent, a 5% vacancy and credit-loss allowance, and the general expenses that a landlord should expect to cover over time. 

Income or expense	Annual amount	Model assumption
Scheduled rent	$18,000	$1,500 × 12 months
Vacancy and credit-loss allowance	-$900	5% of scheduled rent
Effective gross income	$17,100	Scheduled rent less vacancy allowance
Property taxes	-$3,000	Illustrative assumption
Landlord insurance	-$1,800	Illustrative assumption
Management	-$1,710	10% of effective gross income
Routine repairs	-$900	5% of scheduled rent
Leasing and turnover allowance	-$600	Annualized assumption
Water, registration, inspections, and other owner costs	-$600	Illustrative assumption
Net operating income	$8,490	Before debt service and capital replacements

 

We also set aside a separate $900 annual reserve for larger items such as a roof, furnace, water heater, or other major replacements. That reserve doesn’t change the model’s NOI, but it does affect the cash that actually remains in your account.

We include management in the model even when an owner self-manages. 

You may choose to manage the property yourself, but a conservative underwriting model should still recognize the cost of the work—and a future buyer may do the same.

Two Loans, One Rental

Now let’s put two different loans against the same $8,490 of modeled NOI. 

Both use an assumed 7.5% fixed rate and a 30-year amortization. 

Metric	Borrow $112,500	Borrow $75,000
Monthly principal and interest	$787	$524
Annual debt service	$9,439	$6,293
Operating DSCR	0.90	1.35
Monthly cash after modeled reserve	-$154	$108

 

One loan leaves the property about $154 per month negative after the reserve; the other leaves about $108 per month positive.

The difference is DSCR (debt-service coverage ratio). This is calculated by taking your NOI and dividing it by your annual debt service. 

So a 1.00 DSCR means “modeled NOI = modeled debt service”. 

A 1.25 DSCR means the property generates $1.25 of NOI for every $1.00 of annual debt service.

Many loan programs and investors look for a DSCR around 1.20 to 1.25, but the required ratio varies. In this model, a 1.25 target means the property supports about $6,792 in annual debt service. 

At the assumed 7.5% rate and 30-year amortization, that supports a loan of approximately $80,948.

The appraisal permits $112,500. The model’s rent and expenses support about $81,000. That’s the gap you should understand before taking the maximum available cash out.

The Exit Number: An Illustrative Stress Test

There’s one more question worth asking before you refinance: if your plans changed in two years, would the property still leave you options?

The table below uses the same illustrative $8,490 annual NOI, hypothetical 7%, 8%, and 9% capitalization assumptions, 7% selling costs, and estimated loan balances after 24 months. 

It shows how higher leverage can reduce your room to maneuver in the future, if you wanted to:

Illustrative exit scenario	Income-indicated value	Estimated proceeds after 7% selling costs	Cash after estimated 24-month balance: $112,500 starting loan	Cash after estimated 24-month balance: $75,000 starting loan
7% cap-rate assumption	$121,286	$112,796	$2,450	$39,232
8% cap-rate assumption	$106,125	$98,696	-$11,649	$25,133
9% cap-rate assumption	$94,333	$87,730	-$22,615	$14,166

 

So the larger starting loan could leave you about $11,649 short after selling costs and the estimated remaining loan balance. The smaller loan, meanwhile, leaves you $25,133 in the black.

Cash-Out Refinance in Detroit: Specifics to Consider

Detroit rental underwriting needs parcel-level numbers. 

Taxes, insurance, water responsibility, registration and inspection costs, repair history, condition, and neighborhood-specific rent levels can make two apparently similar properties perform very differently.

For example, we pulled three similar listings on the market right now in Morningside, and the annual taxes for them ranged from $2,614 to $5,072. So make sure you verify the tax record for the actual parcel instead of relying on a generic percentage or a prior owner’s bill.

Two Michigan tax rules to know

A refinance doesn’t itself uncap taxable value. In Michigan, a qualifying transfer of ownership can uncap taxable value in the following calendar year. Creating, ending, or assigning a mortgage or security interest is not itself a transfer of ownership for taxable-value uncapping.

Don’t assume the seller’s Principal Residence Exemption applies to a rental. Michigan’s PRE is tied to qualifying owner occupancy and other conditions. If you’re underwriting a rental, use the current parcel record and confirm the tax treatment applicable to your ownership and use.

For transaction-specific tax questions, confirm the property record with the local assessor and consult a qualified tax professional.

How Much Should You Actually Borrow?

For a conservative rental refinance, start with the lowest of these three limits:

Limit	Illustrative amount	Why it matters
What the lender allows	$112,500	Sets the maximum under the appraisal and assumed 75% LTV rule
What the rental supports	About $80,948	Meets the model’s 1.25 DSCR target at the assumed rate and term
What the selected exit stress test supports	$88,696	Leaves a $10,000 equity cushion after 7% selling costs in the illustrative 8% scenario

 

In this example, the cash-flow figure—roughly $81,000—is the conservative starting point. It’s the limit the property has to support month after month, not just at closing.

Your own number may be higher or lower depending on your loan terms, interest-rate risk, reserve position, portfolio liquidity, intended hold period, other income, risk tolerance, and what you plan to do with the cash. 

But those are decisions you should make deliberately—not consequences you discover after the loan funds.

 

What to Prepare Before Appraisal

1. The full loan terms in writing. Get the rate, whether it is fixed or adjustable, amortization, maturity date, fees, escrows, reserve requirements, prepayment penalty, and recourse terms.
2. The lender’s coverage calculation. Ask what rent, expenses, DSCR threshold, valuation, and interest-rate assumption the lender is using.
3. The current tax record for your parcel. Don’t use a listing estimate or a previous owner’s bill without verifying it.
4. A current landlord-insurance quote. Insurance should reflect the actual coverage and rebuild-cost needs of the property, not just what you paid for it.
5. Last 12 months of income and expenses. Pull the actual lease, rent ledger, repairs, utilities, turnovers, taxes, insurance, and any recurring city or registration costs.
6. Current rental competition. Compare the home with the properties renters are choosing now, not only the rent you hoped to receive when you bought it.
7. A broker’s view of possible exits. Ask how the property may be positioned for sale vacant and tenant-occupied, including likely preparation, timing, and selling costs.
8. A reserve decision. Decide what cash stays with the property after closing before you decide what cash goes into the next deal.

 

We’ll Help You Run the Numbers

Send us the address, current lease and rent ledger, the last 12 months of expenses, and the loan terms you’ve been quoted.

We’ll help you review what the house leases for in its current condition, what the property may support under conservative operating assumptions, and which local expenses should be verified before you make a refinance decision.

Talk to our team →